Centrifugal and turbine pump and the like.



W. 0. BROWN; 7 GENTRIIUGAL AND TURBINE PUMP AND THE LIKE.

APPLIOATION FILED JUNE 27, 1908.

Patented Feb. 14, 1911.

2 SHE ETSSHEET 1.

fiwerdan- W. G. BRGWN. UENTRIPUGAL AND TURBINE PUMP AND THE LIKE.

APPLIUATION FILED JUN 2'? 1908, I

' Patented Feb. 14, 1911.

UNITED STA-res Parlour onrren.

WILLIAM C. BROWN,

OF PRESCOTT, ONTARIO,

CANADA.

GE'N'IRIFUGAL AND TURBINE PUMP AND THE LIKE.

Specification of Letters Patent.

Patented Feb. 14., 1911.

Application filed June 27, 1908. Serial No. 440,655.

' To all whom it may concern:

Bo iiiknown that 1, WILLIAM C. B nown, a citizen of the United States, residing at Prescott, Province of Ontario, and Dominion of Canada, have invented certain new and useful Improvements in Centrifugal and Turbine Pumps and the Like, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

The especial object of the present lnvention is to provide, a centrifugal pump by.

which-eddies in the flow shall be avoided and a high efiiciency secured.

The invention is especially intended for pumps oft-hat class employing a series ofv impellers, through which the fluid passes successively, and commonly. known as multistage pumps, but the broader features of the invention may be used in single stage pumps employing one or more impellers. I secure the desired result by passages extending from the outer ends of the diffusing vanes, to the suction of the next impeller-or to the delivery of the last impeller if a delivery 'at the end ofthe pump be used, these passages being of substantially the same area as the outer ends of the diffusing passages, so as to get suliistantially the same velocity of flow from the diffusing vanes to the next impeller suction or to the delivery. I

In the accompanying drawings forming a. part of this specification, the'invention is illustrated as applied in its preferred form to a four stage pump of a Well known type, and this" construction will now be described in'deta'il and the features forming the in vention then specifically pointed out in the claims.

In the drawings, Figure 1 is a vertical 5' and 1 of Fig: 1.

Referring to the drawings, A are the im pellers, shown as of the usual closed impeller type, B the shaft' carrying the impellers, and C, I the suction and delivery at opposite ends of the pump. The impeller is shown as having the usual curvedvanes, 1, and balancing openings 2 through the hub, but these features-are notfessential. The casing is vformed by the suction head E, the delivery head F and-the outside casing G, Within which are mounted onthe shaft the partition section's Hand difiusi'ng rings I,

carrying the diffusing vanes 10, forming the diffusing passages ,11, all as well known in such .pump constructions.

Referring now to the present invention, the casing G has the interior ribs or vanes 12 extending fromthe outer ends of the ,difiusing vanes 10 to the ribs or vanes 13 on the partitions, the ribs or vanes 12, 13 forming passages 14 extending from the outer ends of the diffusing passages 11 sub stantially to the suction of the next impeller in the case of the first and intermediate impellers, the vanes 12 being preferably formed integral with the casing G and the vanes 13 integral with the partition sections H, although this method of construction is not essential. In the construction shown, six diffusing passages 11 and correspond ing passages 14; are shown, but it will be understood that this number may be varied.

The stationary vanes 13 are shown in Fig. 3 .as diverging somewhat, so that the dimensions of'thc passages 14 transversely to the pump increase son'iewhat toward the center of the pump. This construction is preferable, so as to form a narrow meeting surface of adjacent vanes 13 at the center, as otherwise fiat surfaces surrounding the impeller suction would be formed, permittipg eddies at the center of the pump. As shown, the vanes 13 of adjacent passages are brought substantially to a meeting line 4:. 'As shown in Fig. 1, the side walls of the passages 1d converge toward the center sons to reduce the dimensions of the passages longitudi nally of the pump and thus compensate for the increase of the other dimensions and secure the passage area desired.

If a central delivery of the last impeller be used, the construction preferably will be the same as with the first and intermediate impellers, and it will be understood that the last impeller may deliver from the diffusing passages 11 through the ordinary annular chamber surrounding the difiiising ring. A preferred form of delivery is shown, howone side of the center, which involves some change from the construction shown in connection with the other impellers, in that the stationary vanes 15in the head F and passages 16 between them, corresponding to the vanes. 13 and passa es 14, are of varying length and construction, so as to converge at the delivery l9. A guiding cone 3 is preferably used on the last partition H opposite the delivery D to guide the fluid from the passages 15 to the deliverywitl'iout forming eddies. 4

While the invention is especlally intended .for use in centrifugal pumps for liquids, it may-be used also in blowers and the like for gaseous fluids, and by reversal the invention may be applied also in motors if desired, and

such uses are within the invention,

It is to be understood that the'lnvent on not to be limited to the exact form or arrangement of the passages shown, nor to the special class or details of construction of the the suction of the vnext impeller.

' 3. In a ;Inu'lti-stage centrifugal pump, blower, or the like, a series of impellers hav 2. In a niulti-stage centrifugal punip, blower, or the like," an [impeller having curved diffusing passages surrounding the impeller and delivering radially, and corre sponding passages of substantially uniform area connecting the diffusing passageswith ing'difl using passages surrounding the ima pellers, corresponding passages of subst an'-.

tially uniform area connecting the diffusing passages of the first and intermediate-ism; j.

pellets with the suction of the nextimpeller,

and corresponding passages of substantially pellers, corresponding pas-sagesof'substanuniform area connecting'the diffusing 'pas sages of the last; impeller with the delivery.

4. In a multistage. centrifugal .Tp-urnp, blower, or the like, a series ofimpellers having diffusing passages surrounding-the iiin;

with aitially uniform area connecting the diffusing passages of the first and intermediate impellers with the suction of the next impeller, and corresponding passages of substantially uniform -area connecting thefdifliusing pas sageslof the last impeller with the delivery,

said delivery being placed at the end of the pump on one" side 0 the center.

.5. In a mult-i-stag'e centrifugal. pump,

blower, or the like, a series of impellers having diffusing passages surround ng the 1111? 1 pell'ers, corresponding passages' of substantially' uniform area connecting the diffusing passagcsof the first and intermediate irn."

pellers with the suction of thenext' impeller,

' corresponding passages of 'substantialty uni form urea throughout connecting the difi'us ing, passages of the last impeller with the delivery, said d livery being placed at the end of the pump on one side of the center,

and a guide cone 3 in the delivery. I 6. A centrifugal pump, blower, osthe like,

- having-difiusing passages, surrounding the impeller, 21 delivery longitudinal of the irspeller shaft and-onone side of the center, and corresponding passagesot substantially uniform'farea connecting the difiu'sing passages-with the delivery. I

" A centrifugal pu'nip 'blower, or the like,

having difiu'sing passages surrounding the -'iinpeller,- a delivery. longitudinal of the impeller shaftand on one; side of the center, corresponding passages of substantially unit 'orm areaeonneeting the diffusing passages deliverm'anda guide cone 3 in the p p v v i ivvILLIAM" Gin-Rows. t e e R, Hutu-son,

Ina MA-Y-' MORELAND.

\1 tdstirnon 'alr hereof I have hereunto set in and, in t ve-presence of two subscribing 

